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16 Cards in this Set
- Front
- Back
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How does one convert from fahrenheit (F) to Celsius (C)?
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T(F)=(9/5)T(C)+32
fahrenheit = (9/5)Celsius plus 32. |
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How does one convert from Celsius to Kelvins (K)?
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T(K) = T(C)+273 (rounded)
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What does the symbol Q stand for in thermal physics?
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Amount of heat is represented by Q.
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What does the symbol c stand for in thermal physics?
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C is the specific heat of a material.
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What is the euqation that connects the amount of heat with a temperature?
In other words, how much heat does a material have with a specific temperature? |
Q=mc▲T
Heat (in joules) is mass * specific heat * change in temperature. |
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What equation gives us the heat required to change the phase of an object?
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Q=mL
where L is the latent heat of transormation. |
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What equation tells us how much an object expands?
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▲L = α(Li)▲T
change in length = α (coefficient of linear expansion) * initial length * change in temperature. |
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What equation gives us the change in volume?
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▲V = β(Vi)▲T
change in volume = β (coefficient of colume expansion) * initial volume * change in temperature |
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Equation to find pressure?
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P = F/A
Pressure = Force/Area P is measures in pascals (N/m²) |
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What is the Ideal Gas Law?
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PV = nRT
Tip: remember by its name: PivNirt. |
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Equation for velocity of gas molecules?
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v = sqrrt[(3RT)/M]
velocity = square root of three * R * Temperature / Molecular Mass |
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Work is done when volume changes. What is the equation to find work?
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W = P▲V
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If volume is constant, then the energy needed to change the temperature of a certain # of moles is...
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Q = n(Cv)▲T
where Cv is the molar heat capacity at constant volume |
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If pressure is constant, then the energy needed to change the temperature of a certain # of moles is...
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Q = n(Cv)▲T
where Cv is the molar heat capacity at constant pressure |
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Change in Potential Energy =
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▲U = Q - W
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How do you find the efficiency of an engine?
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1) W=Qh-Qc
2) e=W/Qh |
